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Add assertion to aid type checking.
PiperOrigin-RevId: 568220760 Change-Id: Ied9e33692bbd7fb8c02b039f64688cc31f005885
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alphafold/data/templates.py

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@@ -449,6 +449,7 @@ def _get_atom_positions(
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mask = np.zeros([residue_constants.atom_type_num], dtype=np.float32)
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res_at_position = mmcif_object.seqres_to_structure[auth_chain_id][res_index]
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if not res_at_position.is_missing:
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assert res_at_position.position is not None
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res = chain[(res_at_position.hetflag,
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res_at_position.position.residue_number,
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res_at_position.position.insertion_code)]

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